A rap group considered among the greatest and most influential ever will reunite to headline Bethlehem's Musikfest, it was announced Wednesday.

Run-DMC, the first rap group with gold and platinum albums, to be nominated for a Grammy Award and to have videos shown on MTV, will take Musikfest's main Steel Stage at 7:30 p.m. Aug. 6.

It makes Musikfest among a handful of events for which the group, which broke up in 2002, has reunited. It first got back together for Jay-Z's Made In America Festival in Philadelphia in 2012 and has played just three festivals since, the last in 2014.

Tickets, at $49 and $74, will go on sale at 10 a.m. May 10 to ArtsQuest members and 10 a.m. May 13 to the public at www.musikfest.org and 610-332-3378.

The show is the seventh of 10 headliners to be announced for this year's Musikfest, which runs Aug. 5-14.

Run-DMC — with members Joseph "Run" Simmons, Darryl "DMC" McDaniels and Jason "Jam Master Jay" Mizell — broke on the scene in 1984 with its self-titled debut album, which went gold and produced three Top 15 R&B hits, including "It's Like That."

The group's 1985 sophomore disc, "King of Rock," went platinum and had three more R&B hits, including the title track.

But it was the group's third album, 1986's "Raising Hell," with which it crossed over to a broader audience. It topped the R&B chart, but also reached No. 6 on the overall album chart with the hits "My Adidas," "You Be Illin'" and "It's Tricky."

It also included the group's cover of Aerosmith's "Walk This Way," which it performed with Aerosmith and which also crossed over to become a Top 5 hit on the overall singles chart and produced a hit MTV video.

The follow up to "Raising Hell," 1988's "Tougher Than Leather," also sold platinum.

The group was so influential that it was the second rap act to appear on "American Bandstand" and first on the cover of Rolling Stone magazine, and in 1985 was the only hip-hop act to perform at the massive Live Aid concert for African famine relief in 1985.

Run-DMC has had 15 Top 40 R&B hits.

Its last gold album was "Down with the King" in 1993 and its last disc 2001's "Crown Royal." The group broke up after Jam Master Jay was shot to death in 2002.

In 2004, Rolling Stone ranked the group No. 48 in its list of greatest musical artists of all time, and in 2007 MTV chose it as The Greatest Hip-Hop Group of All Time and VH1 as the Greatest Hip-Hop Artist of All Time.

The group was inducted them into the Rock and Roll Hall of Fame in 2009, just the second hip-hop act inducted, behind Grandmaster Flash and the Furious Five.